Adbanced Numerical Simulation of Compressible Two-phase Flow of diesel atomization
JAXA Supercomputer System Annual Report April 2017-March 2018
Report Number: R17ECMP04
Subject Category: Competitive Funding
- Responsible Representative: Takuji Kurotaki, Aeronautical Technology Directorate, Numerical Simulation Research Unit
- Contact Information: Takuji Kurotraki kurotaki@chofu.jaxa.jp
- Members: Takuji Kurotaki
Abstract
Atomization of fuel of aeronautical engines is focused in because of fuel consumption and environmental issues. Information from CFD results is very helpful for solutions of them. The research of numerical simulation of compressible muti fluid flow is conducted to apply for these problems.
Reference URL
N/A
Reasons for using JSS2
Super computer system can be used from simple problems for the validation of basic method to relatively large application for unsteady and multi dimensional problems. It is convenient for the speed up of development of numerical cord.
This kinds of simulation deal with unsteady problems and in order for the reduction of computational time, the ability of handling of parallel computing is indispensable.
Achievements of the Year
Two main approach to the simulation of compressible multiphase flow are investigated; diffuse interface approach which treats the interface as mixture of both fluids and sharp interface approach with levelset method.
In the development of diffuse interface approach, basic equations are extended to six equation model and by considering the chemical equilibrium it became to possible to treat phase change such as cavitation. Atomization of fuel from 2D nozzle is simurated by this chords.
In the development of sharp interface approach, new HLLC scheme which is extended to treat phase change models at the interface and it was confirmed that the problem of the cavitation collapse are simulated accurately and the methods to inprove the mass prezervation was investigated.
Publications
■ Presentations
1) Sumi, Kurotaki,’ Ubsteady Numerical Simulation of Compressible Gas-Liquid Two-Phase Flow for Ultra-High-Pressure Fuel Injection,’The 28th Internal Conbustion Symposium (2017), 13.
Usage of JSS2
Computational Information
- Process Parallelization Methods: N/A
- Thread Parallelization Methods: OpenMP
- Number of Processes: 1
- Elapsed Time per Case: 10.00 hours
Resources Used
Fraction of Usage in Total Resources*1(%): 0.00
Details
Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.
System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
---|---|---|
SORA-MA | 0.00 | 0.00 |
SORA-PP | 4,466.74 | 0.06 |
SORA-LM | 0.00 | 0.00 |
SORA-TPP | 0.00 | 0.00 |
File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
---|---|---|
/home | 005.09 | 0.00 |
/data | 078.01 | 0.00 |
/ltmp | 1,041.67 | 0.08 |
Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
---|---|---|
J-SPACE | 0.00 | 0.00 |
*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).
*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report April 2017-March 2018